今天在做系统时遇到一个问题，点击dataGridView某一行时，要在上面的textbox和ComboBox中有显示相应的数据。由于数据库中存的只是combobox中items的id值，因此在ComboBox的数据显示时，出现了苦难。后来经过多次尝试终于找到了一个比较理想的解决方案，现在分享给大家。

 public class ComboBoxItem

    {         private string _key = string.Empty;         private string _value = string.Empty;         public ComboBoxItem(string pKey, string pValue)         {             _key = pKey;             _value = pValue;         }         public override string ToString()         {             return this._value;         }         public string Key         {             get             {                 return this._key;             }             set             {                 this._key = value;             }         }         public string Value         {             get             {                 return this._value;             }             set             {                 this._value = value;             }         }

 public static int  getIndex(ComboBox aa, string a)

        {             ArrayList al = new ArrayList();             for (int i = 0; i < aa.Items.Count;i++ )             {                 al.Add(((ComboBoxItem)aa.Items[i]).Key);             }             return al.IndexOf(a);

          int  s = ConstDataCtl.getIndex(this.comboBox2, this.dataGridView1.SelectedRows[0].Cells[8].Value.ToString());

          this.comboBox2.SelectedIndex = s;